MB39A130APFT-G-BND-ERE1 Infineon

MB39A130A MB39A130A 1ch DC/DC Buck Converter IC with Synchronous Rectification Description MB39A130A is a 1ch DC/DC Buck converter equipped with a bottom detection comparator and N-ch/N-ch synchronous rectification. It supports low on-duty operation to allow stable output of low voltages when there is a large difference between input and output voltages. MB39A130A realizes ultra-rapid response and high efficiency with built-in enhanced protection features. Features Power conversion efficiency :96 % (Max.) Adjustable frequency setting by an external resistor :100 kHz to 600 kHz High accuracy reference voltage : 1.0% Output voltage setting range :0.7 V to 5 V or fixed to 1.2 V/2.5 V Adjustable output voltages setting by the external control Input voltage range (V ) :4.5 V to 25 V IN Inductor saturation detection function which can be set optional Built-in over voltage protection function Built-in under voltage protection function Built-in over current protection function Built-in Power-Good detection function Built-in over temperature protection function Built-in soft-start circuit without load dependence Built-in discharge control circuit Built-in synchronous rectification type output driver for N-ch MOS FET Standby current : 0 A (Typ.) Small package : TSSOP-24 (4.4 6.5 mm ) Applications Digital TV Photocopiers STB BD, DVD players/recorders Projectors Various other advanced devices Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 002-08423 Rev. *C Revised June 13, 2017MB39A130A Contents Description ........................................................................1 9.9 Inductor Saturation Detection Block (LSAT Comp.) Features .............................................................................1 ............................................................................... 22 Applications ......................................................................1 9.10 Over-voltage Protection Circuit Block (OVP Comp.) 1. Pin Assignment ...........................................................3 ............................................................................... 23 2. Pin Descriptions ..........................................................4 9.11 Under-voltage Protection Circuit Block (UVP Comp.) 3. Block Diagram .............................................................5 ............................................................................... 24 4. Absolute Maximum Ratings .......................................6 9.12 Power-Good Detection Circuit Block (PGOOD Comp.) 5. Recommended Operating Conditions .......................7 .............................................................................. 24 6. Electrical Characteristics ............................................8 9.13 Output Block (Drv-1, Drv-2) .............................. 25 7. Diagram of Feedback Voltage Measurement Circuit 9.14 Control Block (CTL) .......................................... 25 .....................................................................................12 9.15 Bias Voltage Block (VB Reg.) ........................... 25 8. Typical Characteristics .............................................13 9.16 Over temperature Protection Circuit Block (OTP) 9. Function .....................................................................17 ............................................................................... 25 9.1 Reference Voltage Block (REF) .........................18 10. Protection Function Table ...................................... 26 9.2 Under Voltage Lockout Protection Circuit Block (UVLO) 11. I/O Pin Equivalent Circuit Diagram ........................ 27 ...............................................................................18 12. Example Application Circuit ................................... 30 9.3 Soft-start Block (Soft-Start) .................................18 13. Parts List .................................................................. 31 9.4 Discharge Block (Discharge) ..............................18 14. Application Note ...................................................... 32 9.5 ON/OFF Time Generator Block (t Generator) 15. Reference Data ........................................................ 53 ON ...............................................................................19 16. Usage Precaution .................................................... 57 9.6 Output Voltage Setting Block (VO REFIN Control, Error 17. Ordering Information ............................................... 57 Comp.) .................................................................20 18. RoHS Compliance Information ............................... 57 9.7 Current Detection Block (Current Sense) ...........21 19. Package Dimensions ............................................... 58 9.8 Over Current Detection Block (ILIM Comp.) .......21 Sales, Solutions, and Legal Information ......................60 Document Number: 002-08423 Rev. *C Page 2 of 60